Table 6.
Summary of results of regression analysis for responses Y1 and Y2
| Models | R2 | Adjusted R2 | Predicted R2 | Standard deviation | PRESS | Remarks |
|---|---|---|---|---|---|---|
| Response Y1 | ||||||
| Linear | 0.8120 | 0.8012 | 0.6214 | 3.36 | 32.20 | |
| 2FI | 0.9968 | 0.9944 | 0.9871 | 1.77 | 50.00 | Suggested |
| Quadratic | 0.7261 | 0.8172 | 0.7725 | 0.40 | 26.30 | |
| Cubic | 0.9020 | 0.7963 | 0.8912 | 3.63 | 42.20 | |
| Response Y2 | ||||||
| Linear | 0.6588 | 0.6062 | 0.7863 | 3.80 | 12.00 | |
| 2FI | 0.9890 | 0.9808 | 0.9561 | 1.07 | 18.18 | Suggested |
| Quadratic | 0.9012 | 0.8817 | 0.8588 | 4.97 | 11.00 | |
| Cubic | 0.9214 | 0.8825 | 0.8590 | 6.50 | 15.36 | |
| Regression equations of the fitted models | ||||||
| Y1=+45.63−19.38A + 4.38B +9.38C | ||||||
| Y2=+87.22+6.13A − 2.04B −3.08C | ||||||
Note: The bold values signifies the terms of the suggested model.